Though we're also sure none were better than Skrillex, who performed the closing set.

Skrillex and fellow producer Diplo have joined forces as EDM duo Jack Ü. They played a Jack Ü track called Where Are Ü Now, which features Justin Bieber and guess what… Biebs showed up!

The crowd exploded as Bieber came onto stage and started "singing" and dancing around! His singing looks a little "lip synchy" but his dance is straight robotic awesomeness (or awkwardness). Either way it's great to watch.

Also, make sure to watch for the best part in the middle when JB actually loses his